seL4/seL4

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

5717 stars · 803 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

seL4 is a formally verified microkernel operating system kernel written in C, providing high-assurance isolation and capability-based security. It is designed for embedded and safety/security-critical systems and is typically used as a component within a larger build system.

Use cases

• build a formally verified secure operating system kernel
• run isolated components on an embedded microkernel
• develop safety-critical or security-critical firmware
• learn about capability-based microkernel design
• port a microkernel to custom hardware
• achieve strong isolation between system components

When to choose

• you need mathematically proven kernel correctness and strong isolation guarantees
• you are building embedded, automotive, avionics, or defense systems with high-assurance requirements
• you want a small, fast, capability-based microkernel foundation

When to avoid

• you need a general-purpose desktop or server OS with broad driver support out of the box
• your team cannot handle the steep learning curve of capability-based microkernel programming
• you need a quick application platform rather than a kernel to build upon

Facets

library · maturity active

security embedded operating-systems security embedded-systems embedded iot cross-platform c microkernel formal-verification kernel capability-based-security real-time isolation operating-systems

Member repositories

For agents

markdown · JSON · MCP: product_card(name="seL4/seL4")